Tehran Habitant, young people like to take weekend hikes in the canyon north of Tehran "Kolak-Tchal" area

Dr. Fosiee Tahbaz, formerly Professor of the College of Agriculture of the University of Tehran with her old colleague Dr. Hossein Lessani, Professor of the University of Tehran collecting along the Kolak-Tchal trail

Native weeds in the region north of Tehran

Onosma sp. (Boraginaceae) in Kolak-Tchal

Tahbaz talks to a young Iranian boy about the local flora in Kolak-Tchal